Refilling Of Grade I Argon Gas Of Purity 99.9995%(Min) With Purity Certificate For Spectrographic Analysis. Cylinder Capacity. 7Cum. Twelve Cylinders To Be Refilled And Supplied As And When Required Within A Period Of 12 Months From The Date Of Issue Of P.O. Transportation Of Empty And Filled Cylinders Shall Be Done By The Supplier At Their Own Cost. ]